code: def _get_shape(cls, input_shape, op):
      return (input_shape[0],)
  
imports: import numpy
  from ...None import opcodes
  from ...core import OutputType
  from ...core.operand import OperandStage
  from ..utils import gen_unknown_index_value, hash_dataframe_on
  from ._duplicate import DuplicateOperand, validate_subset
label_desc: Use image node_id 2 for calling the DataFrameDuplicated obj's underlying member method code with example usage: obj._get_shape(cls, input_shape, op) and returns: input_shape